Various shots of UNDERGROUND operations, men walking towards and past camera, walking away from camera; of cage descending to a stop at camera level, man coming out of gloom of tunnel, passing camera. Man with head lamp on march on camera, stops, looks around at walls, ceiling of tunnel. Shots of ore carts in use. Interior UNDERGROUND shots of uranium mine, TILT UP to face of men drilling. CU of hands putting explosive inside rock followed by a little explosion. Carts being loaded and unloaded. Miners drilling. Man with a jersey on which "Eldorado Port Radium" is written is shown selecting ore. Cut to ore on conveyor.